Magnetic-lock-operating device



Oct. 2, 192s. 1 686 202 C. W. CHERRY MAGNETIC LOCK OPERATING DEVICEFiled July 27, 1925 Patented Oct. Y2*, 192g.

uN1TEu^srATEs- Matz CARL W. oHnRRYjoF SAN FRANCISCO, CALIFORNIA.I

MAGNETIC-LOCK-OPERATING DEVICE.

Application led July 27, 1925. .Seral'Noi 46,429.

. This invention relates tomagnetic locks in general and 1n particularto such magnetic locks as shown in thehome savings bank, for i which Ihave a copending patent application tiled July 27, 1925, under SerialNo; 46,428.V vThe principal object the invention here# underis 'toprovide a special magnetic 'key forunlocking and -lockingyhome vsavingsbanks, suchkey to be in the custody ot the banking institution issuingthe small home Asavings banks so that the institution only will Figure 2is a perspective view of the comremove the acplete magnetic lockoperating device with the bank dotted in position above it; Y

Figure 3 is an end view of the bank in position on the extended poles ofthe electromagnet with the concealed bolts dotted in operative relationto the poles, and in unlocked position; and

Figure 4 is an enlarged vertical section of the Contact switch forcompleting the electrical circuit through the magnet windings.

The bank 1 is fully described in my cepending application referred to,and thereforewill only be sufficiently described herein to show theoperativeness ofthe. magnetic lock operating device ot which this is aspecification.

Figure 1 shows the bank asa bowl shaped receptacle 1 closed with ailathead or plate 2 having a hinged door 3 and a coin slot el.

The door is preferably spring actuated so as to fly open whenunlockedvand is locked when closed by sliding iron or steel bolts 5 throwninward by springs G all concealed below the plate 2 permanently securedto thel shell of the bowl, and is only unlocked by magnetic influenceapplied at the proper points at opposite sides of the shell by thespecial electroma gnet 7 shown in Figure 2.

y This electromagnet has upwardly extending pole pieces 8 with inwardlyconfronting curved :faces 9 againstwhich the rim of the bank is placedwhen it is desired to unlock the same, a brass guard plate 10 extendingfrom pole to pole braces them and functions as a stop to the flat end ofthe bank when the bank is placedagainst the poles as shown in dottedlines in F igurefl, or full lines in F i gure 3.

`The bank being round, it must be revolved. until the door Ydista-ndsvertical v*with respect tothe magnet 7 so as to bring the pole piecesv.directly in line with the endsl of the bolts 5.

The shell ofthe bankandslidable mount*- of the'bolts is preferablyoffbrass or other non-'magnetic material so that the-bolts 4willresidual magnetism, and Vupon energizing vthe magnet the bolts are bothdrawn outwardly to the limits of; travel, as indicated in Figure3,7thusunbolting the door and nnakig,r it free' to y open. n d i Toenergize the magnet it is proposed to complete the electric circuitbypressing on a switch 11 with the rear end of the bank after vrevolvingit to the correct position as mentioned.

This switch 11 is positioned so that it comes directly under the end ofthe bank as indi' cated in Figure 1 so that upon pressing down` ward onlthe rear end of the bank the switch will alsor be depressed to com letethe circuit not have aftendencyto be impeded through from the lead wires12 an 12. delivering alternating current from the ordinary light socket.

The switch and magnet .are preferably mounted on a pair of insulatingbases 13-18 with the wiring to the magnet concealed between them, andthe dotted extensions 12 and 12 of the electric leads show the subypanel path of the current to theterminals 14e-14C respectively of themagnet windings. A

In Figure 4 the construction of the switch is seen to be a metal rod 15vertically slidable in an insulating sleeveV 16 secured to the blocks 17in turn secured to the base 13, and adapted upon being `depressed tocontact a terminal 18vconnected to the lead 12 extending under the basefrom binding post 19 connected'to lead .12', f i

, The switch is normally open, however, by I a pair of wire springs 20engaging ametal cross bar 21 secured to a flattened' side of the yrod 15and active to urge the rod in an upward direction.

` These springs form a path for the, current from the rod 15 after samecontacts the terminal 118 and lead the current to the screw 22 whichsecures the springs to the base, and through whichscrew the currentJfollows the sub panel Wire 12 to the magnet coil termi- 7 nal 14.-.

12-12 connected to the light socket, no en-,

ergy flows througlithe magnet coils until the 1 bank is lplaced inposition and the rear end depressed to force down the switch whichinimediatel energizcs they magnet Witliithe Aresultoft e powerfulmagnetic attraction .in-

'stant-lj7 pulling out both'b'olts against the tension'lof s rings 6 totheI positionindicated `Figure 3, thus allowing the doorv to s ringopen, or when the bolts are thus Witlr'rawn rent broken to permit thebolts the door if open may' be closed and cury to snap in- Ward-ly andlocky the door. A

In contemplating the invention as above described, Ait will be evidentthat many Vchanges inthe form of' switch and arrange mentof wiring,etc., may be made- Without departing'romthe spiritof `the invention; l

and any such are intended to be embraced in the appended claims.

I claim:

1.v A magnetic-lock operating device coniprising a support for carryinga'V bank having .a curved Wall, a portion of said support to contactWithsaid curvedvyall and to conformY therewith, magnets carried by saidsupport and being. positioned so as to lie opposite magnetic boltscarried by a bank when the bank is disposed place and means forenergizing said magnets.

QA magnetic-lock operating device com-k prising a support for carrying abank having a curved wall, a portion of said support to contactWith'said curved Wall and to; conform I therewith, magnets'rcarriedbysupport" and being positionedso as to lie opposite magnetic'boltscarried by a bank when the bank is disposedy in place andmeans `forenergizing said magnets, saidmeans compris ing aA switch in electricconnection With said magnets and with asource of" current, said switchbeing Vactuated by the vvhen the bank is disposed position.'y

CARL W.l CHERRY.

